Fig. 2.

Multiple sequence alignment of protease from COVID-19 with YP_009724389.1 and PDB template 4MM3_B chain using CLUSTALΩ. While the conserved residues have been highlighted with “*”, partially conserved residues are marked by “.” symbols. Highlighted regions show the conservation of the ligand binding sites (thr⁷⁵, arg¹⁴¹, gln¹⁷⁵and his¹⁷⁶)